Warning:1.Keep away from children play.2.Please do not directly at your eyes with taillight,avoid unnecessary harm.3.Do not place the alarm on your ear,avoid pressing the alarm button or hearing damage,at least two meters away from your ears.4.After long time not to use,you need to make it full charged when you use it again,and when you charge it,the light will alarm sound.5.Suggest you to regular charge it,if you do not use it for a long time.